After I replaced my radiator, my a.c.quit

I overheated the engine due to a slow leak, and then drove the truck like that for two weeks until I had both time and money to buy a new radiator, refilling it before every trip.

After I replaced the radiator, I had transmission trouble because the transmission cooling return fitting was cracked. Fixed that, filed the transmission fluid back up, and that's when I noticed the truck getting hotter in the cab.

Engine cooling works well, and I have no further transmission problems. But now the a.c. is kaput. I've already been over the lines to see if we nicked anything when we were doing the work, but it doesn't look like it.

Check the operation of the cooling fan or fans as well. (http://www.aa1car.com/library/cooling_fan_relay_problems.htm) I believe you have a secondary fan just for the AC condenser, so check the fan relay for that fan. The AC only comes on when both radiator and condenser fans come on.